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-   -   Junction box calculation mind screw (http://www.diychatroom.com/f18/junction-box-calculation-mind-screw-24047/)

Kingsmurf 07-21-2008 08:49 PM

Junction box calculation mind screw
 
can anyone help me get to the quick with the end result of the Junction box calculations
2 inch EMT conduit running horizontally . .entering back of Junction box . .then a 2 inch
EMT existing right angle down through bottom of can to cabinets
No splices . . . .will ground box of course
Conductors . .208 volt 3 PH

3- #0/2 hots THHN
1- # 0/2 neutral THHN
1- #4 ground
what dimenrsion metal ..removable cover Junction box can I use for this?
in your debt for any help Kingsmurf imwithpug@gmail.com

Stubbie 07-22-2008 11:33 PM

The box would need to be and 12" deep..... 6 times the diameter of the conduit entering the back of the box to the opposite wall.... the removable cover. For the angle pull to exit the bottom of the box would need to be 12" from where the conduit enters the back of the box in order to maintain bending space. This is assuming no other entries by other conduits.

BTW you should always position your jb so the conduit will enter the ends this allows for smaller depth and smaller jb's.


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